Hahaha, good man, come find me during Exeter Freshers and we'll have a beer together!
TBH, I pestered all the people I could think of/get contact details for, and eventually got in several months under the age limit (but my paperwork was dated correctly
) It's amazing what people will do for you if you show willing, and keep in touch. Visiting in person is a great idea, as it shows you are really interested, and gives them a face to put to telephone calls/emails, especially if you make a good impression in person.
The OTC is like the TA in that it's part-time, and there the resemblance pretty much ends. In an over-generalised nutshell, the OTC is a student cadet drinking club with an Army problem, and the TA is currently training up blokes to deploy to Afghan to relieve overburdened regular units. Both have pros and cons - the OTC has no deployment liabilty (you won't suddenly be yanked from your degree to go and have a pop at Terry Taliban, for example) and fits in nicely with your studies, tending to be more sympathetic to your degree, whereas the TA is more full-on, you will take part in more advanced training, be a proper soldier, and have many more opportunities to get stuck in the warry stuff - doesn't take a genius to guess which I'm with!
The reason I mentioned the reserve forces is because of the training you might receive. For example, much of the theatre specific training I've been undertaking recently is very much like police work, with the arresting of suspects, locating and recording evidence etc. Obviously I'm not prepared to go into detail, but I've been told it's very similar to how the police handle things.
As to whether the police recognises time in the OTC, that's beyond my area of expertise, but I'd imagine it certainly wouldn't harm your application.
See you in September